<!--
 * @Author: WangGuojian 1085844536@qq.com
 * @Date: 2023-08-09 18:37:46
 * @LastEditTime: 2023-08-09 20:12:07
 * @LastEditors: WangGuojian 1085844536@qq.com
 * @FilePath: \vue-basic\12-列表渲染\4.列表排序.html
 * @Description:
-->
<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <title>列表过滤</title>
        <script type="text/javascript" src="../js/vue.js"></script>
    </head>
    <body>
        <div id="root">
            <!-- 遍历数组 -->
            <h2>人员列表</h2>
            <input type="text" v-model="keyWord" placeholder="请输入名字" />
            <button @click="sortType = 2">年龄升序</button>
            <button @click="sortType = 1">年龄降序</button>
            <button @click="sortType = 0">原顺序</button>
            <ul>
                <li v-for="(p,index) of filPersons" :key="index">
                    {{ p.name }}-{{ p.age }}-{{ p.sex}}
                </li>
            </ul>
        </div>
    </body>

    <script type="text/javascript">
        Vue.config.productionTip = false;

        // 用computed实现
        new Vue({
            el: '#root',
            data: {
                keyWord: '',
                sortType: 0, // 0原顺序 1升序 2降序
                persons: [
                    { id: '001', name: '马冬梅', age: 30, sex: '女' },
                    { id: '002', name: '周冬雨', age: 31, sex: '女' },
                    { id: '003', name: '周杰伦', age: 18, sex: '男' },
                    { id: '004', name: '温兆伦', age: 19, sex: '男' },
                ],
            },
            computed: {
                filPersons() {
                    const arr = this.persons.filter((p) => {
                        return p.name.indexOf(this.keyWord) !== -1;
                    });
                    // 判断一下是否需要排序
                    if (this.sortType) {
                        arr.sort((p1, p2) => {
                            return this.sortType === 1
                                ? p2.age - p1.age
                                : p1.age - p2.age;
                        });
                    }
                    return arr;
                },
            },
        });
    </script>
</html>
